Lachnopus dilatatus was named by Theobald (1937). Its type specimen is Bale Museum R 589(92), an elytra, and it is a compression fossil. Its type locality is Kleinkembs, which is in an Oligocene lacustrine - large marl/limestone in the Salt Formation of Germany.

Cleonus foersteri was named by Theobald (1937). Its type specimen is Bale Museum R 808(593), an elytra (pair of elytra), and it is a compression fossil. Its type locality is Kleinkembs, which is in an Oligocene lacustrine - large marl/limestone in the Salt Formation of Germany.

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.